http://bugzilla.opensuse.org/show_bug.cgi?id=1159882 http://bugzilla.opensuse.org/show_bug.cgi?id=1159882#c3 --- Comment #3 from robert spitzenpfeil <rs.opensuse@spitzenpfeil.org> --- I first noticed it on my work laptop, when copying a VM image (about 30G) from A to B. That machine has an i7, NVME storage (samsung 960 EVO) and 16GB of RAM. At one point it was hitting swap massively (high IO, not amount swapped out at any given time), and the GUI would freeze for seconds at a time. I was wondering why the heck it would start using swap at all. All of this badness goes away when turning swap off completely. I don't have anything useful to say as to when this may have started, just that I've never before experienced such pathological behaviour when just copying a file! As described in the forum posts, it just doesn't make any sense whatsoever. I do expect a massive performance penalty when swap is used, that is not the question. The question here is, why it hits swap at all. My suspicion is that buffers grow to a point that triggers swapping, which should never happen. For convenience I started testing on the old laptop, different hardware, slower, much less RAM, just to rule out some freak HW issue or configuration differences. Both run up to date TW. -- You are receiving this mail because: You are on the CC list for the bug.